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Comprehensive Plan Coastal Management Element Table 9,4: Revised Sea Level Rise Inundation Estimates for Indian River Countv. Florida* Probability 1ft Inundation 2ft Inundation 3ft Inundation Category Area (in Sq. Area (in Sg. Area (in Sq. Miles Miles) Miles Possible 5.95 6.95 6.05 More Likely 0.90 2.84 6.54 Probability Acres Acres Acres Category Possible 3,809.97 4,447.07 3,871.39 More Likely 575.53 1,814.65 4,187.81 *Source: NOAA Coastal Services Center, Charleston, S.C., 2012, and Indian River County Environmental Planning 2017. Note` The geographic areas within the probability categories "Possible" and "More Likely" do not over1g. Inundation Risk by Land Use The total land use area at risk from each SLR inundation scenario was analvzed. When evaluated based on total acres inundated, the data indicate that under all three inundation scenarios theerg impacts of SLR are on lands designated Conservation and Recreation. Notably, privately owned estuarine wetlands and undeveloped lagoon island conservation areas appear to be the most vulnerable to SLR inundation impacts. It is estimated that more than 85% of currently existing coastal wetlands are at risk of inundation under the 3 foot sea level rise scenario. Physical infrastructure such as roadways, power plants, ports and airports, landfills, hospitals and schools were determined to be critical facilities that were initially evaluated in the 2013 Seven50 report. Based on the best available data from the NOAA Coastal Service Center sea level projection models, risks to physical infrastructure at the one, two and three foot scenarios are described below. • Indian River County has 4 airports east of 1-95. No impacts were reported. • FPL has seven parcels under the category of Electrical Power Substation. The City of Vero Beach has nine. No impacts were reported. • FEC Railroad rights of way were assessed but did not show a vulnerability to sea level rise (no miles of track impacted). • The water and wastewater treatment plant analysis included the Indian River Wastewater and Water Treatment facilities. Significant impacts may be encountered at facilities located along the Indian River Lagoon which incorporate coastal mosquito impoundments and estuarine marshes. • Indian River County has 2 parcels under the data category of landfills. No impacts were reported. Community Development Department Indian River County 44 APPENDIX A